NotifyDataErrorValidationRule Class
[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
Represents a rule that checks for errors that are raised by a data source that implements INotifyDataErrorInfo.
System.Windows.Controls.ValidationRule
System.Windows.Controls.NotifyDataErrorValidationRule
Namespace: System.Windows.Controls
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
The NotifyDataErrorValidationRule type exposes the following members.
| Name | Description | |
|---|---|---|
 | NotifyDataErrorValidationRule | Creates a new instance of the NotifyDataErrorValidationRule class. |
| Name | Description | |
|---|---|---|
| ValidatesOnTargetUpdated | Gets or sets a value that indicates whether the validation rule runs when the target of the Binding is updated. (Inherited from ValidationRule.) |
| ValidationStep | Gets or sets when the validation rule runs. (Inherited from ValidationRule.) |
| Name | Description | |
|---|---|---|
| Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Validate(Object, CultureInfo) | Performs validation checks on a value. (Overrides ValidationRule.Validate(Object, CultureInfo).) |
| Validate(Object, CultureInfo, BindingExpressionBase) | Performs validation checks on a value. (Inherited from ValidationRule.) |
| Validate(Object, CultureInfo, BindingGroup) | Performs validation checks on a value. (Inherited from ValidationRule.) |
The WPF data binding model enables you to associate ValidationRules with a Binding or BindingGroup object. The NotifyDataErrorValidationRule class is a built-in rule that checks for exceptions that are thrown during the updates of the binding source property. You can provide custom logic to specify how the binding engine handles these exceptions by using a UpdateSourceExceptionFilterCallback. For more information, see UpdateSourceExceptionFilter.
An alternative syntax to setting the NotifyDataErrorValidationRule explicitly is to set the ValidatesOnExceptions property to true on your Binding, MultiBinding, or BindingGroup object. By default, the value of ValidatesOnExceptions is true, so you do not need to explicitly use a NotifyDataErrorValidationRule.
You can create a custom rule by creating a class that derives from ValidationRule. For more information and a detailed discussion of data validation, see Data Binding Overview.
Windows 8 Consumer Preview, Windows Server 8 Beta, Windows 7, Windows Server 2008 SP2, Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
